JP3424253B2 - Vacuum cleaner suction tool - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction device for an electric vacuum cleaner used in general households.

[0002]

2. Description of the Related Art Conventionally, the suction tool of this type of vacuum cleaner is
For example, there is a configuration as disclosed in Japanese Patent Laid-Open No. 63-197422. The configuration will be described with reference to FIG. It consists of upper case 1 and lower case 2, and lower surface 3
A suction tool body 5 having a suction port 4 formed therein, a rotor 6 provided with a gear portion provided at the suction port 4, and a motor 7 for driving the rotor 6 via the gear portion are provided. A changeover switch 8 for changing the direction is provided, and a lever 10 for changing over the actuator 9 of the changeover switch 8 is provided so as to project from the lower surface 3 of the lower case 2, and the lever 10 is operated in conjunction with the forward movement and the backward movement of the suction tool body 5. It operates so that the rotation direction of the motor 7 is switched.

[0003]

In such a conventional structure, when a telephone or the like is called during cleaning, if the suction tool body 5 is inadvertently left as it is, the rotor 6 is If the child keeps rotating and accidentally raises the suction tool body 5 from the floor and touches the rotor 6, it is very dangerous and seriously injured. Further, the lever 10 for switching the rotation direction of the motor 7 is attached to the lower surface 3 of the lower case 2.
Because it is provided on the lever, a child may accidentally use this lever 1
If you switch 0, the danger will double and triple.

Further, since the lever 10 is provided so as to project from the lower surface 3 of the lower case 2, the sucked dust adheres to the periphery of the rotating portion of the lever 10, which deteriorates the rotatability and the operation of the changeover switch 8. There was a problem such as.

The present invention is intended to solve the above problems, and it is a first object of the present invention to provide a suction tool for an electric vacuum cleaner which is excellent in safety and operability for children.

[0006] It is also a primary purpose is to provide a further safety vacuum cleaner suction tool provided with a suction hole in nameplate affixed to upper case for better operability.

A second object of the present invention is to provide a suction tool for an electric vacuum cleaner having an air intake hole structure with improved appearance.

A third object of the present invention is to provide a suction tool for a vacuum cleaner which prevents dust from entering and improves operation durability.

[0009]

In order to achieve the above object, the present invention provides a suction means main body having an upper case and a lower case, a suction port being formed on a lower surface thereof, and a suction port. A rotor provided with the provided gear portion and a motor for driving the rotor through the gear portion are provided, a switch chamber for attaching a changeover switch for changing the rotation direction of the motor is provided, and a lever for changing over the actuator of the changeover switch is provided. Providing on the lower surface of the lower case, the lever operates in conjunction with the forward movement and backward movement of the suction tool body, the rotation direction of the motor is switched, and when the suction tool body is lifted in the air, The lever is energized by a spring or the like so as to be positioned at approximately the middle of the range operated when the lever is moved forward and backward, and at this time, the changeover switch is turned on so that the rotation of the motor is stopped. Intended structure in which the F position, is provided with a suction hole for taking the outside air into the switch chamber that is attached to the changeover switch.

Further, in addition to the above structure , an intake hole is provided in a nameplate in which an intake hole for taking in outside air into the switch chamber is attached to the upper case.

The second means is to connect with the intake hole formed in the nameplate.
Insert the intake hole through the recess in the upper case below the nameplate.
Also, the two air intake holes are formed so as not to face each other. Third means is located between the intake hole formed on the nameplate, an intake hole formed in the concave portion of the upper case
The rib body is formed in the recess, and the rib body contacts the lower surface of the nameplate.
It was made .

[0012]

When the suction tool body is lifted in the air as in the first means, it is urged by a spring or the like so as to be positioned at approximately the middle of the range in which the lever moves forward and backward. At this time, since the changeover switch is provided with an OFF position so that the rotation of the motor is stopped, when the phone etc. is called during cleaning, the suction tool body is inadvertently left as it is. The rotor remains rotating, but if a child accidentally raises the suction tool body from the floor, the rotor will automatically stop and it is safe to touch the rotor.

Further, even if the pressure inside the switch chamber becomes negative due to suction of the cleaner body during the cleaning work, the outside air with a small amount of dust is sucked into the switch chamber, so that it is difficult for dust to enter the switch chamber and the lever, spring, and switching are performed. The operation of switches etc. can be performed reliably and with good durability.

Further, since the intake hole for taking in the outside air into the switch chamber is provided in the nameplate attached to the upper case, the outside air on the upper surface of the upper case, which is relatively dustless during the cleaning work, is sucked into the switch chamber. It is possible to prevent the entry of dust.

The second means is to connect with the intake hole formed in the nameplate.
Insert the intake hole through the recess in the upper case below the nameplate.
Also, since the intake holes are formed so as not to face each other, the invasion of dust from the upper surface can be reduced, so that the operability of the changeover switch can be secured and the appearance can be improved. A third means is to form a rib body located between the air intake hole formed on the name plate and the air intake hole provided in the recess of the upper case into a recess.
Since the rib body is abutted against the lower surface of the nameplate, the intrusion of dust from the upper surface can be reduced more than the second means, so that the operation durability of the changeover switch can be secured. As described above, it is possible to provide a suction tool for an electric vacuum cleaner which is superior in safety and is more convenient to use.

[0016]

EXAMPLES Hereinafter, the first invention, the second will be described with reference to FIGS. 1 to 7 for one embodiment according to the third hand stage.

Reference numeral 21 is a main body of the suction tool, and an upper case 25
And a lower case 26, and a suction port 28 on the lower surface 27.
Is formed. A rotor 30 having a gear portion 29 provided at the suction port 28 and a motor 32 for driving the rotor 30 via the gear portion 29 and the belt 31 are provided.

A changeover switch 33 for changing the rotation direction of the motor 32 is provided, and a sliding body 35 is fitted to an actuator 34 of the changeover switch 33.
The sliding body 35 is provided with springs 36 and 37 on the front and rear, respectively. When the actuator 34 is slid back and forth, the springs 36 and 37 are compressed by the ribs 38 and 39. It comes to be located in the middle of. Reference numeral 40 denotes a switch chamber in which the change-over switch 33 is mounted, and is composed of an upper case 25 and a lower case 26. Reference numeral 41 denotes a lever, which is rotatably provided with a shaft 42 as a fulcrum, and a fitting portion 44 rotatably fitted to a cylindrical portion 43 of a sliding body 35 fitted to an actuator 34 and a lower case 26. And an operation portion 46 located in the operation chamber 45 formed on the bottom surface of the. When the operating portion 46 of the lever 41 is moved back and forth,
The fitting portion 44 rotates, and the actuator 34 operates backward and forward. This operation room 45 and the switch room 40
Is a bearing portion 4 for rotatably holding the shaft 42 of the lever 41.
It communicates via 2a.

When the suction tool body 21 is moved forward and backward with respect to a cleaning surface such as a carpet, the lever 41 causes the operation portion 46 of the lever 41 to move due to contact resistance with the carpet.
To the left and right of. Reference numeral 47 is a nameplate attached to the recess 48 on the top surface of the upper case 25, and has a plurality of intake holes A49. The recess 48 is located above the switch chamber 40 in which the changeover switch 33 is mounted, and is provided with a plurality of intake holes B5.
Has 0. The intake hole A49 and the intake hole B50 are for sucking the air outside the suction tool body 21 into the switch chamber 40.

Further, as shown in FIG. 2, the intake holes A49 and B50 are provided with opening holes at positions which do not face each other.
Reference numeral 51 is a rib body formed in the concave portion 48,
9 and the intake hole B50 and is in contact with the lower surface of the name plate 47. The side surface of the rib body 51 does not contact the wall surface of the concave portion 48 to form the space portion 52, and the intake hole A49 and the intake hole B5 are formed.
It constitutes an air passageway with 0.

In such a structure, the suction tool main body 21
When the actuator is floated in the air, the actuator 34 and the lever 41 are located in the middle of the front and rear operation ranges, so that the terminal 47 of the changeover switch 33 is not electrically connected as shown in FIG. Is in the OFF position,
The motor 32 does not rotate.

Next, when the suction tool body 21 is moved forward on the cleaning surface, the lever 41 is rotated backward and the actuator 34 is moved.
Moves forward and is connected to the motor 32 via the terminal 47 of the changeover switch 33 as shown in FIG. 6, so that the rotor 30 is rotated in a fixed direction.

Further, when the suction tool body 21 is moved backward, it operates in the opposite manner to the above, and as shown in FIG.
Connected to the motor 32 via the terminal 47 of the rotor 30
Rotates in reverse to the above.

The operation and action of this embodiment will be described. When the suction tool main body 21 is lifted in the air by the first means, the changeover switch 33 is in the OFF position. Therefore, it is careless when a call etc. is received during cleaning. Even if the suction tool body 21 is left as it is, a child mistakenly sucks the suction tool body 21.
When it is touched and raised from the floor surface, the lever 41 and the cylindrical portion 35 are positioned in the central portion due to the urging force of the springs 36 and 37, and the rotor 30 stops, so that it is safe to touch the rotor 30. .

Further, since the switch chamber 40 in which the changeover switch 33 is mounted is provided with the intake hole B50 for sucking the outside air, the pressure in the switch chamber 40 becomes negative due to the suction of the cleaner body 20 during the cleaning work. However, the outside air with less dust is taken into the switch chamber 40. Therefore, the bearing portion 4
Operation room 45 communicating with switch room 40 via 2a
The dust inside will not be sucked into the switch chamber 40, and the dust will not enter. Therefore, the operations of the lever 41, the springs 36 and 37, the changeover switch 33, etc. inside the switch chamber 40 can be surely performed.
Durable.

Further, since the intake hole A49 for taking in the outside air into the switch chamber 40 is provided in the name plate 47 attached to the upper case 25, the outside air on the upper surface of the upper case 25, which is relatively dustless during the cleaning work, is introduced into the switch chamber 40. Since the air is taken in, it is possible to more reliably prevent dust from entering the switch chamber 40.

The second means is the recess 48 of the upper case 25.
Intake hole A49 of the nameplate 47 attached to the upper case 2
5, the intake hole B50 provided in the concave portion 48 is configured so as not to face the intake hole B50, and intrusion of dust from the upper surface can be reduced, so that the operability of the changeover switch 33 can be secured.
Moreover, since the lower portion of the intake hole A49 of the name plate 47 is covered with the recess 48 of the upper case 25, it cannot be seen as a penetrating hole when viewed from the upper side of the suction tool body 21, so that the appearance can be improved.

Depending on the third means, it is located between the intake hole A49 of the name plate 47 attached to the recess 48 of the upper case 25 and the intake hole B50 provided in the recess 48 of the upper case 25, and is located on the lower surface of the name plate 47. Since the rib body 51 in contact is formed, the invasion of dust from the upper surface can be reduced more than the second means, so that the operational durability of the changeover switch 33 can be secured. As described above, it is possible to provide the suction tool of the electric vacuum cleaner which is excellent in safety and is easy to use.

[0029]

As described above, according to the first aspect of the present invention, when the suction tool body is lifted in the air, the changeover switch is in the OFF position, so that it is suitable for small children. Is safe. Also, even if the pressure inside the switch chamber becomes negative due to suction of the vacuum cleaner body during cleaning work, the outside air with a small amount of dust is drawn into the switch chamber, so dust does not easily enter the switch chamber and levers, springs,
The operation of the changeover switch can be performed reliably and with good durability.

Further , since the intake hole for taking in the outside air into the switch chamber is provided in the nameplate attached to the upper case, the outside air on the upper surface of the upper case, which is relatively dustless during the cleaning work, is sucked into the switch chamber. It is possible to more reliably prevent the entry of dust.

The second means is such that the air intake hole of the nameplate attached to the recess of the upper case and the air intake hole provided in the recess of the upper case are in a non-opposite positional relationship, and dust from the top surface is prevented from entering. Since it can be reduced, the operability of the changeover switch can be secured. Moreover, since the lower part of the intake hole of the nameplate is covered with the concave portion, it cannot be seen as a hole penetrating from the upper side, so that the appearance can be improved. Depending on the third means, by the rib body located between the intake hole of the nameplate attached to the recess and the intake hole provided in the recess and abutting the lower surface of the nameplate, dust from the upper surface more than the second means Since it is possible to reduce the number of intrusions, it is possible to secure the operation durability of the changeover switch. As described above, it is possible to provide the suction tool of the electric vacuum cleaner which is excellent in safety and is easy to use.

[Brief description of drawings]

FIG. 1 is a top view of a suction tool of an electric vacuum cleaner showing an embodiment of the present invention.

FIG. 2 is a plan view of a main part of a suction tool of the electric vacuum cleaner.

FIG. 3 is a front sectional view of a suction tool of the electric vacuum cleaner.

FIG. 4 is a sectional view taken along line AA of the suction tool of the electric vacuum cleaner.

FIG. 5 is a circuit diagram when the suction tool of the vacuum cleaner is moved forward.

FIG. 6 is a circuit diagram when the suction tool of the vacuum cleaner is moved backward.

FIG. 7 is a circuit diagram when the suction tool of the electric vacuum cleaner is lifted in the air.

FIG. 8 is a vertical sectional view of a suction tool of an electric vacuum cleaner showing a conventional example.

[Explanation of symbols]

21 Suction tool body 25 upper case 26 Lower case 27 Lower surface 28 Suction port 29 Gear 30 rotor 32 motor 33 Changeover switch 34 Actuator 40 switch room 41 lever 47 nameplate 48 recess 49 Air intake hole A 50 Intake hole B 51 rib body

Continuation of the front page (56) Reference JP-A-2-52619 (JP, A) JP-A-5-269057 (JP, A) JP-A-63-197422 (JP, A) JP-B-61-51884 (JP , B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) A47L 9/04

Claims (3)

(57) [Claims] 1. An upper case and a lower case,
A suction tool body having a suction port formed on the lower surface, a rotor provided at the suction port, a motor for driving the rotor, a changeover switch for controlling the rotation direction of the motor, and a switch chamber for mounting the changeover switch are provided. Provided, the lever for switching the actuator of this changeover switch is provided so as to project from the lower surface of the lower case, and the lever operates in conjunction with the forward movement and the backward movement of the suction tool body, and the rotation direction of the motor is controlled. when lifting the suction tool main body in the air, at configuration rotation of the motor is stopped, the intake holes the switch chamber and the outside air is communicated, above
Vacuum cleaner suction device formed on the nameplate attached to the case . 2. An air intake hole communicating with an air intake hole formed in a nameplate.
2. The suction tool for an electric vacuum cleaner according to claim 1 , wherein said suction plate is also formed in a concave portion of the upper case below said name plate, and said intake holes are arranged so as not to face each other. 3. A rib body located between the intake hole formed in the nameplate and the intake hole provided in the recess of the upper case is formed in the recess.
Form, suction tool of claim 2 Symbol <br/> mounting of the electric vacuum cleaner is brought into contact with the rib member to the lower surface of the nameplate.